2025 RI H2Chem Prelims P4 Prep List

Consolidated Prep List Chemicals Label Chemical Preparation Quantity (mark up) Quantity (approx. required) Remarks Qn FA 1 Manganese(II) sulfate 0.25M and 0.25M aluminum sulfate 10 cm3 5 cm3 Provide in vial 1 FA 2 1.0 mol dm-3 sodium carbonate 5 cm3 2 cm3 Provide in vial 1 FA 3 2.0 mol dm-3 hydrochloric acid 10 cm3 5 cm3 Provide in vial 1 FA 4 30%(v/v) ethanol + 0.3 mol dm-3 glucose 10 cm3 5 cm3 Provide in vial 1 Bench reagents HNO3 NaOH NH3 AgNO3 Limewater I2 (aq) Mg turnings Prepare around 1 long piece of Mg turnings in a vial (students will add all). 1 FA 5 0.60 mol dm-3 NaHCO3 80 cm3 40 cm3 2 FA 6* 1.00 mol dm-3 NaOH 120 cm3 (Q2 & 3) 50 cm3 (Q2) 15 cm3 (Q3) 2 & 3 FA 8 oxalic acid solution Dissolve 2.52 g of H2C2O4.2H2O (oxalic acid) in 1 dm3 of solution. 150 cm3 100 cm3 3 Solution I Thymolphthalein indicator 5 cm3 2 cm3 Provide in vial 3

Apparatus S/N Item Quantity Qn Remarks 1 plastic droppers 5 (Q1) + 1 (Q2) + 2 (Q3) = 8 1 & 2 & 3 2 Glass rod 1 1 3 Paper towels 1 pack 1 4 Test tubes 7 1 Require 7 test tubes. 5 Bunsen burner 1 1 6 Heat mat 1 1 7 Windshield 1 1 8 Lighter 1 1 9 Wooden splint some 1 10 Test-tube holder 1 1 11 Test-tube brush 1 1 12 Universal indicator paper 1 1 13 Filter paper 1 1 14 Deionised water bottle 1 1 & 3 15 Thermometer (0.2 oC division) 1 2 16 Styrofoam cup (to be given as separate cups) 2 2 17 250 cm3 beaker 1 2 18 50 cm3 burette* 1 (labelled FA6 (to share with Q2 & 3) 1 (unlabelled) 2 & 3 19 50 cm3 measuring cylinder 1 2 20 Filter funnel 2 1 & 2 & 3 21 plastic dropper 1 2 22 retort stand with burette clamp 1 3 23 25.0 cm3 pipette 1 3 24 pipette filler 1 3 25 250 cm3 conical flask 2 3 26 white tile 1 3 27 250 cm3 graduated flask 1 3 28 100 cm3 beaker 1 3